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11 Cards in this Set

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Action Potential
Neuron fires à positive charge going through neuron from dendrite to terminal
What is the resting charge of a neuron?
negative
Refractory Period
Neuron is recharging returning to a negative charge. Neuron CANNOT fire again.
NA+K+ Pump
Na+ ions flood into neuron causing Action Potential. Pumped out after charge goes through neuron.
Absolute Threshold
Minimum number of positive ions needed to trigger to an action potential.
Neurotransmitter
Chemical messenger released across synapse to receptor sites on the next neuron. REUPTAKE
Agonist
Takes place/ acts like a neurotransmitter OR enhances effects or neurotransmitter.
Antagonist
Block the effect of neurotransmitters.
What is the function of the myelin sheath?
speeds up neural transmission and insulates the axon
the path of an action potential through a neuron.
dendrite --> cell body --> axon --> axon terminal
Refractory Period
When a neuron is recharging and cannot respond to another stimulus